Solar Hours Calculator
Solar Hours is evaluated from US Region / City and Solar System Size. The calculation reports Peak Sun Hours per Day, Daily Solar Production and Annual Solar Production.
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About the Solar Hours Calculator
### Why Use the Solar Hours Calculator Calculator?
The Solar Hours Calculator is a valuable tool for individuals and organizations looking to harness the power of solar energy. This calculator helps users determine the peak sun hours per day, daily solar production, and annual solar production for a specific location in the US. By using this calculator, users can make informed decisions about the feasibility of solar energy projects, compare the productivity of different locations, and optimize their solar system size. For instance, a homeowner considering installing solar panels can use the calculator to determine how many peak sun hours their location receives per day, which will help them decide on the appropriate system size. Similarly, a business looking to invest in solar energy can use the calculator to compare the solar productivity of different locations and choose the most suitable one.
### History of the Solar Hours Calculator
The concept of solar hours and solar energy production has been around for decades. The idea of measuring the amount of solar energy available at a particular location dates back to the 1950s, when scientists began studying the solar radiation patterns across the US. The National Renewable Energy Laboratory (NREL) has been a leading institution in the development of solar energy mapping and analysis tools. In the 1990s, NREL released the Solar Radiation Data Manual, which provided detailed information on solar radiation patterns across the US. This data has been widely used in the development of solar energy calculators and mapping tools. The Solar Hours Calculator is based on this historical data and uses established formulas to calculate peak sun hours, daily solar production, and annual solar production.
### The Science Behind the Calculations
The Solar Hours Calculator uses a combination of geographical and solar radiation data to calculate the peak sun hours per day, daily solar production, and annual solar production. The calculator takes into account the US region or city and the solar system size to provide accurate estimates. The calculation is based on the following formulas:
- Peak Sun Hours (PSH) = Total Solar Radiation / 1000 W/m²
- Daily Solar Production (DSP) = PSH x Solar System Size (kW)
- Annual Solar Production (ASP) = DSP x 365 days
Where Total Solar Radiation is the amount of solar energy available at a particular location, measured in Wh/m². The Solar System Size is the size of the solar panel system, measured in kW. The calculator uses a database of solar radiation patterns across the US to determine the Total Solar Radiation for a given location. The resulting calculations provide users with a clear understanding of the solar energy potential at their location.
### Real-Life Application and Examples
Let's consider an example where a homeowner in Los Angeles wants to install a 6 kW solar panel system. Using the Solar Hours Calculator, they select "Los Angeles / San Diego" as the US region and enter 6 kW as the solar system size. The calculator returns the following results:
- Peak Sun Hours per Day: 6.2 hrs/day
- Daily Solar Production: 37.2 kWh/day
- Annual Solar Production: 13,578 kWh/yr
The homeowner can use these results to determine the feasibility of their solar energy project. They can see that their location receives an average of 6.2 peak sun hours per day, which is relatively high. The daily solar production of 37.2 kWh/day indicates that their 6 kW solar panel system will produce a significant amount of energy. The annual solar production of 13,578 kWh/yr provides a clear estimate of the total energy production for the year. With this information, the homeowner can make an informed decision about their solar energy project and optimize their system size for maximum energy production.
The Solar Hours Calculator is a valuable tool for individuals and organizations looking to harness the power of solar energy. This calculator helps users determine the peak sun hours per day, daily solar production, and annual solar production for a specific location in the US. By using this calculator, users can make informed decisions about the feasibility of solar energy projects, compare the productivity of different locations, and optimize their solar system size. For instance, a homeowner considering installing solar panels can use the calculator to determine how many peak sun hours their location receives per day, which will help them decide on the appropriate system size. Similarly, a business looking to invest in solar energy can use the calculator to compare the solar productivity of different locations and choose the most suitable one.
### History of the Solar Hours Calculator
The concept of solar hours and solar energy production has been around for decades. The idea of measuring the amount of solar energy available at a particular location dates back to the 1950s, when scientists began studying the solar radiation patterns across the US. The National Renewable Energy Laboratory (NREL) has been a leading institution in the development of solar energy mapping and analysis tools. In the 1990s, NREL released the Solar Radiation Data Manual, which provided detailed information on solar radiation patterns across the US. This data has been widely used in the development of solar energy calculators and mapping tools. The Solar Hours Calculator is based on this historical data and uses established formulas to calculate peak sun hours, daily solar production, and annual solar production.
### The Science Behind the Calculations
The Solar Hours Calculator uses a combination of geographical and solar radiation data to calculate the peak sun hours per day, daily solar production, and annual solar production. The calculator takes into account the US region or city and the solar system size to provide accurate estimates. The calculation is based on the following formulas:
- Peak Sun Hours (PSH) = Total Solar Radiation / 1000 W/m²
- Daily Solar Production (DSP) = PSH x Solar System Size (kW)
- Annual Solar Production (ASP) = DSP x 365 days
Where Total Solar Radiation is the amount of solar energy available at a particular location, measured in Wh/m². The Solar System Size is the size of the solar panel system, measured in kW. The calculator uses a database of solar radiation patterns across the US to determine the Total Solar Radiation for a given location. The resulting calculations provide users with a clear understanding of the solar energy potential at their location.
### Real-Life Application and Examples
Let's consider an example where a homeowner in Los Angeles wants to install a 6 kW solar panel system. Using the Solar Hours Calculator, they select "Los Angeles / San Diego" as the US region and enter 6 kW as the solar system size. The calculator returns the following results:
- Peak Sun Hours per Day: 6.2 hrs/day
- Daily Solar Production: 37.2 kWh/day
- Annual Solar Production: 13,578 kWh/yr
The homeowner can use these results to determine the feasibility of their solar energy project. They can see that their location receives an average of 6.2 peak sun hours per day, which is relatively high. The daily solar production of 37.2 kWh/day indicates that their 6 kW solar panel system will produce a significant amount of energy. The annual solar production of 13,578 kWh/yr provides a clear estimate of the total energy production for the year. With this information, the homeowner can make an informed decision about their solar energy project and optimize their system size for maximum energy production.
Formula & How It Works
The calculation applies the following relations exactly as recorded in the metadata: Daily production = System kW x Peak Sun Hours x 0.80 (efficiency) Annual = Daily x 365 Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.
Worked Examples
Example 1: 6 kW system in Phoenix (7.0 PSH)
Inputs
region: 7.0
system_kw: 6
Peak Sun Hours per Day: 7 hrs/day. Daily Solar Production: 33.6 kWh/day. Annual Solar Production: 12,264 kWh/yr. vs. Phoenix: This is the best solar location in the US!
With US Region / City = 7 and Solar System Size = 6 as the stated inputs, the result is Peak Sun Hours per Day = 7 hrs/day, Daily Solar Production = 33.6 kWh/day and Annual Solar Production = 12,264 kWh/yr. Each value corresponds to the declared output fields.
Example 2: 6 kW system in Seattle (3.5 PSH)
Inputs
region: 3.5
system_kw: 6
Peak Sun Hours per Day: 3.5 hrs/day. Daily Solar Production: 16.8 kWh/day. Annual Solar Production: 6,132 kWh/yr. vs. Phoenix: Phoenix produces 50% more than your location annually
With US Region / City = 3.5 and Solar System Size = 6 as the stated inputs, the result is Peak Sun Hours per Day = 3.5 hrs/day, Daily Solar Production = 16.8 kWh/day and Annual Solar Production = 6,132 kWh/yr. Each value corresponds to the declared output fields.
Example 3: 8 kW system in Dallas (5.5 PSH)
Inputs
region: 5.5
system_kw: 8
Peak Sun Hours per Day: 5.5 hrs/day. Daily Solar Production: 35.2 kWh/day. Annual Solar Production: 12,848 kWh/yr. vs. Phoenix: Phoenix produces 21% more than your location annually
With US Region / City = 5.5 and Solar System Size = 8 as the stated inputs, the result is Peak Sun Hours per Day = 5.5 hrs/day, Daily Solar Production = 35.2 kWh/day and Annual Solar Production = 12,848 kWh/yr. Each value corresponds to the declared output fields.
Example 4: 10 kW system in Miami (5.3 PSH)
Inputs
region: 5.3
system_kw: 10
Peak Sun Hours per Day: 5.3 hrs/day. Daily Solar Production: 42.4 kWh/day. Annual Solar Production: 15,476 kWh/yr. vs. Phoenix: Phoenix produces 24% more than your location annually
With US Region / City = 5.3 and Solar System Size = 10 as the stated inputs, the result is Peak Sun Hours per Day = 5.3 hrs/day, Daily Solar Production = 42.4 kWh/day and Annual Solar Production = 15,476 kWh/yr. Each value corresponds to the declared output fields.
Common Use Cases
- Find peak sun hours for a US location
- Calculate how sun hours affect solar production
- Compare solar productivity across US cities